Description
In libxml2 before 2.15.4, xmlSnprintfElements in valid.c has a strcat stack-based buffer overflow.
Published: 2026-09-05
Score: 8 High
EPSS: < 1% Very Low
KEV: No
AI Analysis

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Remediation

No vendor fix or workaround currently provided.

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Tracking

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Advisories

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History

Wed, 09 Sep 2026 09:30:00 +0000

Type Values Removed Values Added
Metrics ssvc

{'options': {'Automatable': 'no', 'Exploitation': 'none', 'Technical Impact': 'total'}, 'version': '2.0.3'}


Tue, 08 Sep 2026 00:15:00 +0000

Type Values Removed Values Added
Title Stack-Based Buffer Overflow in libxml2's xmlSnprintfElements libxml2: libxml2: Arbitrary code execution via stack-based buffer overflow in xmlSnprintfElements
Weaknesses CWE-120
References
Metrics threat_severity

None

threat_severity

Important


Sat, 05 Sep 2026 06:15:00 +0000

Type Values Removed Values Added
Title Stack-Based Buffer Overflow in libxml2's xmlSnprintfElements

Sat, 05 Sep 2026 04:45:00 +0000

Type Values Removed Values Added
Description In libxml2 before 2.15.4, xmlSnprintfElements in valid.c has a strcat stack-based buffer overflow.
First Time appeared Xmlsoft
Xmlsoft libxml2
Weaknesses CWE-121
CPEs cpe:2.3:a:xmlsoft:libxml2:*:*:*:*:*:*:*:*
Vendors & Products Xmlsoft
Xmlsoft libxml2
References
Metrics cvssV3_1

{'score': 8, 'vector': 'CVSS:3.1/AV:L/AC:L/PR:N/UI:N/S:U/C:H/I:H/A:L'}


cve-icon MITRE

Status: PUBLISHED

Assigner: mitre

Published:

Updated: 2026-09-08T18:06:15.447Z

Reserved: 2026-09-05T04:26:13.510Z

Link: CVE-2026-86140

cve-icon Vulnrichment

Updated: 2026-09-08T18:06:10.755Z

cve-icon NVD

Status : Awaiting Analysis

Published: 2026-09-05T05:17:12.877

Modified: 2026-09-08T21:14:09.040

Link: CVE-2026-86140

cve-icon Redhat

Severity : Important

Publid Date: 2026-09-05T04:26:13Z

Links: CVE-2026-86140 - Bugzilla

cve-icon OpenCVE Enrichment

Updated: 2026-09-08T02:15:08Z

Weaknesses